Remove unused Travis cache scripts

travis/cache-homebrew

@@ -1,6 +0,0 @@
-#!/bin/sh
-
-mkdir travis-cache
-if [ ! -f homebrew-cache.tar.gz ]; then
-  tar czf travis-cache/homebrew-cache.tar.gz --directory /usr/local/Cellar pkg-config readline sqlite gdbm makedepend openssl python@2
-fi

travis/cache-python

@@ -1,5 +0,0 @@
-#!/bin/sh
-
-if [ ! -f python-cache.tar.gz ]; then
-  tar czf travis-cache/python-cache.tar.gz --directory /usr/local/lib/python2.7 site-packages
-fi

travis/download-homebrew

@@ -1,13 +0,0 @@
-#!/bin/sh
-
-curl -L "https://dl.bintray.com/alby128/Syncplay/homebrew-cache.tar.gz" -o homebrew-cache.tar.gz
-if [ -f homebrew-cache.tar.gz ]; then
-  if ! tar tf homebrew-cache.tar.gz &>/dev/null; then
-    rm homebrew-cache.tar.gz
-    exit 0
-  fi
-  tar zxf homebrew-cache.tar.gz --directory /usr/local/Cellar
-  brew unlink pkg-config
-  brew link pkg-config
-  brew link --force readline sqlite gdbm makedepend python@2
-fi

travis/download-python

@@ -1,10 +0,0 @@
-#!/bin/sh
-
-curl -L "https://dl.bintray.com/alby128/Syncplay/python-cache.tar.gz" -o python-cache.tar.gz
-if [ -f python-cache.tar.gz ]; then
-  if ! tar tf python-cache.tar.gz &>/dev/null; then
-    rm python-cache.tar.gz
-    exit 0
-  fi
-  tar zxf python-cache.tar.gz --directory /usr/local/lib/python2.7
-fi