Revert "Tweak github actions to work around old kwargs syntax"

This reverts commit a09adba.

Author: enebo

.github/workflows/ruby.yml

@@ -43,7 +43,6 @@ jobs:
       PREPARED_STATEMENTS: ${{ matrix.prepared_statements }}
       DRIVER: ${{ matrix.driver }}
       JRUBY_OPTS: "-J-Xms64M -J-Xmx1024M"
-      MT_KWARGS_HACK: 1
 
     steps:
       - uses: actions/checkout@v3
@@ -101,8 +100,6 @@ jobs:
       PGHOST: localhost
       PGPORT: 5432
       PGUSER: postgres
-      MT_KWARGS_HACK: 1
-
 
     steps:
       - uses: actions/checkout@v3
@@ -138,7 +135,6 @@ jobs:
       DB: ${{ matrix.db }}
       AR_VERSION: ${{ matrix.ar_version }}
       JRUBY_OPTS: "-J-Xms64M -J-Xmx1024M"
-      MT_KWARGS_HACK: 1
 
     steps:
       - uses: actions/checkout@v3
@@ -181,7 +177,6 @@ jobs:
       MY_USER: root
       MY_PASSWORD: root
       PREPARED_STATEMENTS: ${{ matrix.prepared_statements }}
-      MT_KWARGS_HACK: 1
 
     steps:
       - uses: actions/checkout@v3
@@ -233,7 +228,6 @@ jobs:
       PGHOST: localhost
       PGPORT: 5432
       PGUSER: postgres
-      MT_KWARGS_HACK: 1
 
     steps:
       - uses: actions/checkout@v3
@@ -263,7 +257,6 @@ jobs:
     env:
       DB: ${{ matrix.db }}
       JRUBY_OPTS: "-J-Xms64M -J-Xmx1024M"
-      MT_KWARGS_HACK: 1
 
     steps:
       - uses: actions/checkout@v3