Removed custom plugin in prep for pull request

plugins/caniuse/caniuse.plugin.zsh

@@ -1,23 +0,0 @@
-# CanIUse.com Command Line Search Utility
-# Michael Wales, http://github.com/walesmd
-#
-# A very basic bash function that quickly searches http://caniuse.com/
-#
-# Examples:
-#     caniuse
-#     caniuse border-radius
-#     caniuse "alpha transparency" counters "canvas drawings" html svg
-
-caniuse() {
-    local domain="http://caniuse.com/"
-    local query
-
-    if [ $# -eq 0 ]; then
-        open ${domain}
-    else
-        for term in "$@"; do
-            query=$(python -c "import sys, urllib as ul; print ul.quote('${term}');")
-            open "${domain}#search=${query}"
-        done
-    fi
-}