remove redundant install step

.github/workflows/test_and_publish.yml

@@ -64,9 +64,6 @@ jobs:
     - name: Install PHP dependencies
       run: composer update && composer install --prefer-dist --no-progress
 
-    - name: Install shimmie
-      run: php index.php
-
     - name: Run test suite
       run: |
         if [[ "${{ matrix.database }}" == "pgsql" ]]; then

core/install.php

@@ -214,7 +214,6 @@ function create_tables(Database $db)
             );
         }
 
-        $db->begin_transaction();
         $db->create_table("aliases", "
 			oldtag VARCHAR(128) NOT NULL,
 			newtag VARCHAR(128) NOT NULL,