base: remove mathlimits.h

Author: Mizux

ortools/base/BUILD.bazel

@@ -352,20 +352,12 @@ cc_library(
     deps = [":base"],
 )
 
-cc_library(
-    name = "mathlimits",
-    srcs = ["mathlimits.cc"],
-    hdrs = ["mathlimits.h"],
-    deps = [],
-)
-
 cc_library(
     name = "mathutil",
     srcs = ["mathutil.cc"],
     hdrs = ["mathutil.h"],
     deps = [
         ":base",
-        ":mathlimits",
     ],
 )