GIT-INFO: remove the Mac 10.1-specific details

There shouldn't be many devs out there anymore using such outdated macOS
versions. And it removes the dead link.

Closes curl#1049

GIT-INFO

@@ -51,17 +51,3 @@ installed:
    install them, you can rename the source file src/tool_hugehelp.c.cvs to
    src/tool_hugehelp.c and avoid having to generate this file. This will
    give you a stubbed version of the file that doesn't contain actual content.
-
-MAC OS X
-
- With Mac OS X 10.2 and the associated Developer Tools, the installed versions
- of the build tools are adequate.  For Mac OS X 10.1 users, Guido Neitzer
- wrote the following step-by-step guide:
-
- 1. Install fink (http://fink.sourceforge.net)
- 2. Update fink to the newest version (with the installed fink)
- 3. Install the latest version of autoconf, automake and m4 with fink
- 4. Install version 1.4.1 of libtool - you find it in the "unstable" section
-    (read the manual to see how to get unstable versions)
- 5. Get cURL from git
- 6. Build cURL with "./buildconf", "./configure", "make", "sudo make install"