build/pkgs/maxima/SPKG.rst: delete old patch explanations

We are still describing a bunch of patches that don't exist.

Author: orlitzky

build/pkgs/maxima/SPKG.rst

@@ -47,24 +47,5 @@ Special Update/Build Instructions
 All patch files in the patches/ directory are applied. Descriptions of
 these patches are either in the patch files themselves or below.
 
--  0001-taylor2-Avoid-blowing-the-stack-when-diff-expand-isn.patch:
-   Fix for Maxima bug #2520 (abs_integrate fails on abs(sin(x)) and
-   abs(cos(x))). Introduced in Issue #13364 (Upgrade Maxima to
-   5.29.1).
-
--  build-fasl.patch: Build a fasl library for ecl in addition to an
-   executable program. Introduced in Issue #16178 (Build maxima fasl
-   without asdf).
-
 -  infodir.patch: Correct the path to the Info directory. Introduced
    in Issue #11348 (maxima test fails when install tree is moved).
-
--  matrixexp.patch: Fix matrixexp(matrix([%i*%pi])), which broke after
-   Maxima 5.29.1. Introduced in Issue #13973.
-
--  maxima.system.patch: Set ``c::*compile-in-constants*`` to t.
-   Introduced in Issue #11966 (OS X 10.7 Lion: Maxima fails to build).
-
--  undoing_true_false_printing_patch.patch: Revert an upstream change
-   causing '?' to be printed around some words. Introduced in Trac
-   #13364 (Upgrade Maxima to 5.29.1).