subversion: remove obsolete Darwin cruft

It builds fine without any of this.

pkgs/applications/version-management/subversion/default.nix

@@ -37,10 +37,6 @@ assert pythonBindings -> swig != null && python3 != null && py3c != null;
 assert javahlBindings -> jdk != null && perl != null;
 
 let
-  # Update libtool for macOS 11 support
-  needsAutogen =
-    stdenv.hostPlatform.isDarwin && lib.versionAtLeast stdenv.hostPlatform.darwinMinVersion "11";
-
   common =
     {
       version,
@@ -64,7 +60,7 @@ let
           "man"
         ];
 
-        nativeBuildInputs = lib.optionals needsAutogen [
+        nativeBuildInputs = [
           autoconf
           libtool
           python3
@@ -86,11 +82,7 @@ let
             py3c
           ]
           ++ lib.optional perlBindings perl
-          ++ lib.optional saslSupport sasl
-          ++ lib.optionals stdenv.hostPlatform.isDarwin [
-            CoreServices
-            Security
-          ];
+          ++ lib.optional saslSupport sasl;
 
         patches = [ ./apr-1.patch ] ++ extraPatches;
 
@@ -105,15 +97,7 @@ let
         # "-P" CPPFLAG is needed to build Python bindings and subversionClient
         CPPFLAGS = [ "-P" ];
 
-        env = lib.optionalAttrs stdenv.cc.isClang {
-          NIX_CFLAGS_COMPILE = lib.concatStringsSep " " [
-            "-Wno-error=implicit-function-declaration"
-            "-Wno-error=implicit-int"
-            "-Wno-int-conversion"
-          ];
-        };
-
-        preConfigure = lib.optionalString needsAutogen ''
+        preConfigure = ''
           ./autogen.sh
         '';