cmake: don't include `include/git2`

Including the `include/git2` build path is a seemingly unnecessary
oversight to include the generated `experimental.h` file.

src/cli/CMakeLists.txt

 set(CLI_INCLUDES
 	"${libgit2_BINARY_DIR}/src/util"
 	"${libgit2_BINARY_DIR}/include"
-	"${libgit2_BINARY_DIR}/include/git2"
 	"${libgit2_SOURCE_DIR}/src/util"
 	"${libgit2_SOURCE_DIR}/src/cli"
 	"${libgit2_SOURCE_DIR}/include"

src/libgit2/CMakeLists.txt

@@ -10,7 +10,6 @@ include(PkgBuildConfig)
 set(LIBGIT2_INCLUDES
 	"${PROJECT_BINARY_DIR}/src/util"
 	"${PROJECT_BINARY_DIR}/include"
-	"${PROJECT_BINARY_DIR}/include/git2"
 	"${PROJECT_SOURCE_DIR}/src/libgit2"
 	"${PROJECT_SOURCE_DIR}/src/util"
 	"${PROJECT_SOURCE_DIR}/include")

src/util/CMakeLists.txt

@@ -9,7 +9,6 @@ configure_file(git2_features.h.in git2_features.h)
 set(UTIL_INCLUDES
 	"${PROJECT_BINARY_DIR}/src/util"
 	"${PROJECT_BINARY_DIR}/include"
-	"${PROJECT_BINARY_DIR}/include/git2"
 	"${PROJECT_SOURCE_DIR}/src/util"
 	"${PROJECT_SOURCE_DIR}/include")