Simplify CI setup by changing phpab installation method

.gitlab-ci.yml

@@ -5,16 +5,8 @@ before_script:
     - apt update -yqq
     - apt install git libpq-dev libzip-dev zip make wget gnupg -yqq
 
-    # Install phive
-    - wget -O phive.phar https://phar.io/releases/phive.phar
-    - wget -O phive.phar.asc https://phar.io/releases/phive.phar.asc
-    - gpg --keyserver hkps://keys.openpgp.org --recv-keys 0x9D8A98B29B2D5D79
-    - gpg --verify phive.phar.asc phive.phar
-    - chmod +x phive.phar
-    - mv phive.phar /usr/local/bin/phive
-
     # Install phab
-    - phive install phpab --global --trust-gpg-keys 0x2A8299CE842DD38C
+    - apt install phpab
 
     # Install the latest version of ncc (Nosial Code Compiler)
     - git clone https://git.n64.cc/nosial/ncc.git