Remove redundant CCAP_BUILDING_SHARED macro

Co-authored-by: wysaid <1430725+wysaid@users.noreply.github.com>

Author: Copilot

CMakeLists.txt

@@ -153,7 +153,6 @@ endif()
 
 # Configure shared library export definitions
 if(CCAP_BUILD_SHARED)
-    target_compile_definitions(ccap PRIVATE CCAP_BUILDING_SHARED=1)
     target_compile_definitions(ccap PUBLIC CCAP_SHARED=1)
     if(WIN32)
         target_compile_definitions(ccap PRIVATE CCAP_BUILDING_DLL=1)