build: Drop redundant checks for ranlib and strip tools

These checks are handled by the `LT_INIT` macro.

configure.ac

@@ -108,8 +108,6 @@ LT_INIT([pic-only win32-dll])
 
 dnl Check/return PATH for base programs.
 AC_PATH_TOOL([AR], [ar])
-AC_PATH_TOOL([RANLIB], [ranlib])
-AC_PATH_TOOL([STRIP], [strip])
 AC_PATH_TOOL([GCOV], [gcov])
 AC_PATH_TOOL([LLVM_COV], [llvm-cov])
 AC_PATH_PROG([LCOV], [lcov])