remove ccache micro management (#1448)

Co-authored-by: Jordan Bayles <bayles.jordan@gmail.com>

CMakeLists.txt

@@ -54,16 +54,6 @@ endif()
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
-# ---------------------------------------------------------------------------
-# use ccache if found, has to be done before project()
-# ---------------------------------------------------------------------------
-find_program(CCACHE_EXECUTABLE "ccache" HINTS /usr/local/bin /opt/local/bin)
-if(CCACHE_EXECUTABLE)
-    message(STATUS "use ccache")
-    set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_EXECUTABLE}" CACHE PATH "ccache" FORCE)
-    set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_EXECUTABLE}" CACHE PATH "ccache" FORCE)
-endif()
-
 project(jsoncpp
         # Note: version must be updated in three places when doing a release. This
         # annoying process ensures that amalgamate, CMake, and meson all report the