travis: remove clang-analyze (#2917)

• The output currently contains a large number of false-positives and — AFAICT —
  no actual issues.

• Upstream shows little interest in addressing the long-standing issues with the
  TAILQ macros, so the false-positive situation probably won’t change soon:
  https://bugs.llvm.org/show_bug.cgi?id=18222

Currently, we largely spend travis CPU cycles on this, for no additional value.

travis/deploy-github-pages.sh

@@ -6,7 +6,6 @@ set -x
 GITVERSION=$(git describe --tags)
 
 mkdir build.i3wm.org
-cp -r deb/CLANG build.i3wm.org/clang-analyze
 cp -r deb/COPY-DOCS build.i3wm.org/docs
 cd build.i3wm.org
 echo build.i3wm.org > CNAME