simplify git-revision.h generation.

cmake/configure_musrfit_version_file.cmake.in

@@ -1,30 +0,0 @@
-# configure_musrfit_version_file.cmake.in:
-set(SRC_DIR "@CMAKE_SOURCE_DIR@")
-set(BIN_DIR "@CMAKE_CURRENT_BINARY_DIR@")
-
-# Set variables
-set(CMAKE_INSTALL_PREFIX "@CMAKE_INSTALL_PREFIX@")
-set(MUSRFIT_VERSION "@MUSRFIT_VERSION@")
-
-# Get the current working branch
-execute_process(
-  COMMAND git rev-parse --abbrev-ref HEAD
-  WORKING_DIRECTORY ${SRC_DIR}
-  OUTPUT_VARIABLE GIT_BRANCH
-  OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-
-# Get the latest abbreviated commit hash of the working branch
-execute_process(
-  COMMAND git log -1 --pretty="%h, %ci"
-  WORKING_DIRECTORY ${SRC_DIR}
-  OUTPUT_VARIABLE GIT_CURRENT_SHA1
-  OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-
-configure_file(
-  ${SRC_DIR}/cmake/git-revision.h.in
-  ${BIN_DIR}/git-revision.h
-  @ONLY
-)
-# EOF