Remove FREE_THREADED from docker-compose

Author: AlenkaF

docker-compose.yml

@@ -1220,7 +1220,6 @@ services:
       <<: *common
       CHECK_IMPORTS: "ON"
       CHECK_UNITTESTS: "OFF"
-      FREE_THREADED: "ON"
     command: /arrow/ci/scripts/python_wheel_unix_test.sh /arrow
 
   python-wheel-musllinux-test-unittests:
@@ -1261,7 +1260,6 @@ services:
       <<: *common
       CHECK_IMPORTS: "OFF"
       CHECK_UNITTESTS: "ON"
-      FREE_THREADED: "ON"
     command: /arrow/ci/scripts/python_wheel_unix_test.sh /arrow
 
   python-wheel-manylinux-test-imports:
@@ -1294,7 +1292,6 @@ services:
       <<: *common
       CHECK_IMPORTS: "ON"
       CHECK_UNITTESTS: "OFF"
-      FREE_THREADED: "ON"
     command: /arrow/ci/scripts/python_wheel_unix_test.sh /arrow
 
   python-wheel-manylinux-test-unittests:
@@ -1336,7 +1333,6 @@ services:
       <<: *common
       CHECK_IMPORTS: "OFF"
       CHECK_UNITTESTS: "ON"
-      FREE_THREADED: "ON"
     command: /arrow/ci/scripts/python_wheel_unix_test.sh /arrow
 
   python-wheel-windows-vs2022-base: