Remove that file that is also a standard CMake module

.gitattributes

@@ -1763,7 +1763,6 @@ Installation/cmake/modules/FindMPFI.cmake -text
 Installation/cmake/modules/FindMPFR.cmake -text
 Installation/cmake/modules/FindNTL.cmake -text
 Installation/cmake/modules/FindOpenGL.cmake -text
-Installation/cmake/modules/FindPackageMessage.cmake -text
 Installation/cmake/modules/FindQGLViewer.cmake -text
 Installation/cmake/modules/FindQt3-patched.cmake -text
 Installation/cmake/modules/FindRS.cmake -text

Installation/cmake/modules/FindPackageMessage.cmake

@@ -1,35 +0,0 @@
-# FIND_PACKAGE_MESSAGE(<name> "message for user" "find result details")
-#
-# This macro is intended to be used in FindXXX.cmake modules files.
-# It will print a message once for each unique find result.
-# This is useful for telling the user where a package was found.
-# The first argument specifies the name (XXX) of the package.
-# The second argument specifies the message to display.
-# The third argument lists details about the find result so that
-# if they change the message will be displayed again.
-# The macro also obeys the QUIET argument to the find_package command.
-#
-# Example:
-#
-#  IF(X11_FOUND)
-#    FIND_PACKAGE_MESSAGE(X11 "Found X11: ${X11_X11_LIB}"
-#      "[${X11_X11_LIB}][${X11_INCLUDE_DIR}]")
-#  ELSE(X11_FOUND)
-#   ...
-#  ENDIF(X11_FOUND)
-
-macro(FIND_PACKAGE_MESSAGE pkg msg details)
-  # Avoid printing a message repeatedly for the same find result.
-  IF(NOT ${pkg}_FIND_QUIETLY)
-    SET(DETAILS_VAR FIND_PACKAGE_MESSAGE_DETAILS_${pkg})
-    IF(NOT "${details}" STREQUAL "${${DETAILS_VAR}}")
-      # The message has not yet been printed.
-      MESSAGE(STATUS "${msg}")
-
-      # Save the find details in the cache to avoid printing the same
-      # message again.
-      SET("${DETAILS_VAR}" "${details}"
-        CACHE INTERNAL "Details about finding ${pkg}")
-    ENDIF(NOT "${details}" STREQUAL "${${DETAILS_VAR}}")
-  ENDIF(NOT ${pkg}_FIND_QUIETLY)
-endmacro(FIND_PACKAGE_MESSAGE)