Remove database migration hack in favor of separate service databases

Signed-off-by: Dom Del Nano <ddelnano@gmail.com>

Author: ddelnano

tools/docker/kratos_image/Dockerfile

@@ -31,13 +31,6 @@ RUN git clone --depth 1 https://github.com/ory/kratos.git
 WORKDIR /src/kratos
 RUN git fetch --tags && git checkout $KRATOS_VERSION
 
-# The hydra and kratos migrations attempt to create the same table.
-# Kratos's migration only creates the table while hydra's migration creates the table
-# and inserts a row. Therefore, we replace kratos's problematic version with empty placeholders
-# to avoid a conflict. Removing the problematic migration file prior to module initialization and
-# compilation did not work.
-RUN for file in persistence/sql/migrations/sql/20150100000001000000_networks.*.sql; do echo "-- Migration disabled to avoid conflict with hydra" > "$file"; done
-
 ENV GO111MODULE=on
 # kratos and hydra require CGO if sqlite is used, but we exclusively use postgres
 ENV CGO_ENABLED=0