package/cpp-httplib: remove stale patch

Running the command:

    make cpp-httplib-patch

fails with error:

    Applying 0001-merge-commit-from-fork.patch using patch:
    patching file httplib.h
    Reversed (or previously applied) patch detected!  Skipping patch.
    2 out of 2 hunks ignored -- saving rejects to file httplib.h.rej
    patching file test/test.cc
    Hunk #1 FAILED at 42.
    Hunk #2 FAILED at 2839.
    Hunk #3 FAILED at 3624.
    3 out of 3 hunks FAILED -- saving rejects to file test/test.cc.rej

Commit [1] "package/cpp-httplib: add patch for CVE-2025-46728"
introduced a package patch in the branch next while Buildroot was in
RC cycle. Just after, commit [2] "package/cpp-httplib: bump to
v0.25.0", also in branch next, removed this package patch.

This commit [1] was cherry-picked in [3] in the branch master, to
apply only the security fix for the 2025.08 release.

The merge commit [4] kept the cpp-httplib package patch
"0001-merge-commit-from-fork.patch".

This commit fixes the issue by removing this stale patch.

Fixes:
https://autobuild.buildroot.org/results/5b9843089ade428997035e49817208ce9c09a10e

[1] aea7c89396
[2] 519d03657c
[3] fd313c4ceb
[4] 0af159ae2b

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/cpp-httplib/0001-merge-commit-from-fork.patch

@@ -1,103 +0,0 @@
-From 7b752106ac42bd5b907793950d9125a0972c8e8e Mon Sep 17 00:00:00 2001
-From: Ville Vesilehto <ville@vesilehto.fi>
-Date: Sat, 3 May 2025 11:39:01 +0300
-Subject: [PATCH] Merge commit from fork
-
-* fix(parser): Limit line length in getline
-
-Prevents potential infinite loop and memory exhaustion in
-stream_line_reader::getline by enforcing max line length.
-
-Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
-
-* fix: increase default max line length to 32k
-
-LONG_QUERY_VALUE test is set at 25k.
-
-Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
-
-* test(client): expect read error with too long query
-
-Adds a test case (`TooLongQueryValue`) to verify client behavior
-when the request URI is excessively long, exceeding
-`CPPHTTPLIB_MAX_LINE_LENGTH`. In this scenario, the server is
-expected to reset the connection.
-
-Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
-
-CVE: CVE-2025-46728
-Upstream: https://github.com/yhirose/cpp-httplib/commit/7b752106ac42bd5b907793950d9125a0972c8e8e
-[thomas: adapt lines numbers to v0.19.0]
-Signed-off-by: Thomas Perale <thomas.perale@mind.be>
----
- httplib.h    |  9 +++++++++
- test/test.cc | 15 +++++++++++++++
- 2 files changed, 24 insertions(+)
-
-diff --git a/httplib.h b/httplib.h
-index cb182c4129..a2aa24f96b 100644
---- a/httplib.h
-+++ b/httplib.h
-@@ -145,6 +145,10 @@
- #define CPPHTTPLIB_LISTEN_BACKLOG 5
- #endif
- 
-+#ifndef CPPHTTPLIB_MAX_LINE_LENGTH
-+#define CPPHTTPLIB_MAX_LINE_LENGTH 32768
-+#endif
-+
- /*
-  * Headers
-  */
-@@ -2998,6 +3002,11 @@ inline bool stream_line_reader::getline() {
- #endif
- 
-   for (size_t i = 0;; i++) {
-+    if (size() >= CPPHTTPLIB_MAX_LINE_LENGTH) {
-+      // Treat exceptionally long lines as an error to
-+      // prevent infinite loops/memory exhaustion
-+      return false;
-+    }
-     char byte;
-     auto n = strm_.read(&byte, 1);
- 
-diff --git a/test/test.cc b/test/test.cc
-index 4fd9983bd8..7f5cc8a9d0 100644
---- a/test/test.cc
-+++ b/test/test.cc
-@@ -42,6 +42,9 @@ const int PORT = 1234;
- const string LONG_QUERY_VALUE = string(25000, '@');
- const string LONG_QUERY_URL = "/long-query-value?key=" + LONG_QUERY_VALUE;
- 
-+const string TOO_LONG_QUERY_VALUE = string(35000, '@');
-+const string TOO_LONG_QUERY_URL = "/too-long-query-value?key=" + TOO_LONG_QUERY_VALUE;
-+
- const std::string JSON_DATA = "{\"hello\":\"world\"}";
- 
- const string LARGE_DATA = string(1024 * 1024 * 100, '@'); // 100MB
-@@ -2839,6 +2842,11 @@ class ServerTest : public ::testing::Test {
-                EXPECT_EQ(LONG_QUERY_URL, req.target);
-                EXPECT_EQ(LONG_QUERY_VALUE, req.get_param_value("key"));
-              })
-+        .Get("/too-long-query-value",
-+             [&](const Request &req, Response & /*res*/) {
-+               EXPECT_EQ(TOO_LONG_QUERY_URL, req.target);
-+               EXPECT_EQ(TOO_LONG_QUERY_VALUE, req.get_param_value("key"));
-+             })
-         .Get("/array-param",
-              [&](const Request &req, Response & /*res*/) {
-                EXPECT_EQ(3u, req.get_param_value_count("array"));
-@@ -3624,6 +3632,13 @@ TEST_F(ServerTest, LongQueryValue) {
-   EXPECT_EQ(StatusCode::UriTooLong_414, res->status);
- }
- 
-+TEST_F(ServerTest, TooLongQueryValue) {
-+  auto res = cli_.Get(TOO_LONG_QUERY_URL.c_str());
-+
-+  ASSERT_FALSE(res);
-+  EXPECT_EQ(Error::Read, res.error());
-+}
-+
- TEST_F(ServerTest, TooLongHeader) {
-   Request req;
-   req.method = "GET";