7z, adb: Trivial cleanups

completions/7z

@@ -11,7 +11,7 @@ _7z()
     fi
 
     local mode
-    [[ ${words[1]} == @(a|d|u) ]] && mode=w || mode=r
+    [[ ${words[1]} == [adu] ]] && mode=w || mode=r
 
     case $cur in
         -ao*)

completions/adb

@@ -24,7 +24,7 @@ _adb()
 
     local cmd i
     for (( i=1; i < cword; i++ )); do
-        if [[ "${words[i]}" != -* && "${words[i-1]}" != -@(s|p) ]]; then
+        if [[ "${words[i]}" != -* && "${words[i-1]}" != -[sp] ]]; then
             cmd="${words[i]}"
             break
         fi