Revert "define empty assertion termination function for fixing linkin…

…g with old android ndk (Tencent#5847)"

This reverts commit e431218.

CMakeLists.txt

@@ -723,12 +723,6 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
     endif()
 endif()
 
-if(ANDROID_NDK_MAJOR AND (ANDROID_NDK_MAJOR GREATER_EQUAL 27))
-    # llvm 18 in ndk-27 introduce __libcpp_verbose_abort for assertion output
-    # define empty body for fixing linking issue with old ndk
-    add_definitions("-D_LIBCPP_VERBOSE_ABORT\\(format,args...\\)=")
-endif()
-
 if(NCNN_VULKAN)
     if(NCNN_SYSTEM_GLSLANG)
         find_package(Threads)
@@ -772,10 +766,6 @@ if(NCNN_VULKAN)
             # glslang requires c++11
             set(CMAKE_CXX_STANDARD 11)
 
-            # remove ostream usage in glslang for better libcpp abi compatibility
-            include(cmake/glslang_drop_ostream.cmake)
-            glslang_drop_ostream(${CMAKE_CURRENT_LIST_DIR}/glslang)
-
             option(BUILD_EXTERNAL "" OFF)
             option(ENABLE_SPVREMAPPER "" OFF)
             option(ENABLE_GLSLANG_BINARIES "" OFF)