configure: Remove a check that will always fail

And update the changes file to be more specific.

Part of 32191.

changes/ticket32191

@@ -1,3 +1,3 @@
   o Minor features (build system):
-    - force pkg-config to only use --prefix when cross-compiling.
-      Closes ticket 32191.
+    - Make pkg-config use --prefix when cross-compiling, if PKG_CONFIG_PATH
+      is not set. Closes ticket 32191.

configure.ac

@@ -40,11 +40,6 @@ fi
 if test "x$PKG_CONFIG_PATH" = "x" && test "x$prefix" != "xNONE" && test "$host" != "$build"; then
    export PKG_CONFIG_PATH=$prefix/lib/pkgconfig
    AC_MSG_NOTICE([set PKG_CONFIG_PATH=$PKG_CONFIG_PATH to support cross-compiling])
-   if test -f "$PKG_CONFIG_PATH/libevent.pc"; then
-       echo "checking for $PKG_CONFIG_PATH/libevent.pc... yes"
-   else
-       AC_MSG_ERROR([$PKG_CONFIG_PATH/libevent.pc not found!])
-   fi
 fi
 
 AC_ARG_ENABLE(openbsd-malloc,