refactor: remove in-code warning suppression

Should no-longer be needed post #27872. If it is, then
suppress-external-warnings should be fixed.

Author: fanquake

src/common/run_command.cpp

@@ -12,16 +12,7 @@
 #include <univalue.h>
 
 #ifdef ENABLE_EXTERNAL_SIGNER
-#if defined(__GNUC__)
-// Boost 1.78 requires the following workaround.
-// See: https://github.com/boostorg/process/issues/235
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wnarrowing"
-#endif
 #include <boost/process.hpp>
-#if defined(__GNUC__)
-#pragma GCC diagnostic pop
-#endif
 #endif // ENABLE_EXTERNAL_SIGNER
 
 UniValue RunCommandParseJSON(const std::string& str_command, const std::string& str_std_in)

src/test/system_tests.cpp

@@ -7,16 +7,7 @@
 #include <univalue.h>
 
 #ifdef ENABLE_EXTERNAL_SIGNER
-#if defined(__GNUC__)
-// Boost 1.78 requires the following workaround.
-// See: https://github.com/boostorg/process/issues/235
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wnarrowing"
-#endif
 #include <boost/process.hpp>
-#if defined(__GNUC__)
-#pragma GCC diagnostic pop
-#endif
 #endif // ENABLE_EXTERNAL_SIGNER
 
 #include <boost/test/unit_test.hpp>

src/wallet/bdb.h

@@ -21,14 +21,7 @@
 #include <unordered_map>
 #include <vector>
 
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wsuggest-override"
-#endif
 #include <db_cxx.h>
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
 
 struct bilingual_str;