remove migrations in migrate/ folder

internal/store/database/migrate/sqlite/0020_create_table_builds.up.sql

@@ -1,48 +0,0 @@
-CREATE TABLE IF NOT EXISTS executions (
-    execution_id INTEGER PRIMARY KEY AUTOINCREMENT,
-    execution_pipeline_id INTEGER NOT NULL,
-    execution_repo_id INTEGER,
-    execution_repo_type TEXT,
-    execution_repo_name TEXT,
-    execution_trigger TEXT,
-    execution_number INTEGER NOT NULL,
-    execution_parent INTEGER,
-    execution_status TEXT,
-    execution_error TEXT,
-    execution_event TEXT,
-    execution_action TEXT,
-    execution_link TEXT,
-    execution_timestamp INTEGER,
-    execution_title TEXT,
-    execution_message TEXT,
-    execution_before TEXT,
-    execution_after TEXT,
-    execution_ref TEXT,
-    execution_source_repo TEXT,
-    execution_source TEXT,
-    execution_target TEXT,
-    execution_author TEXT,
-    execution_author_name TEXT,
-    execution_author_email TEXT,
-    execution_author_avatar TEXT,
-    execution_sender TEXT,
-    execution_params TEXT,
-    execution_cron TEXT,
-    execution_deploy TEXT,
-    execution_deploy_id INTEGER,
-    execution_debug BOOLEAN NOT NULL DEFAULT 0,
-    execution_started INTEGER,
-    execution_finished INTEGER,
-    execution_created INTEGER,
-    execution_updated INTEGER,
-    execution_version INTEGER,
-
-    -- Ensure unique combination of pipeline ID and number
-    UNIQUE (execution_pipeline_id, execution_number),
-
-    -- Foreign key to pipelines table
-    CONSTRAINT fk_execution_pipeline_id FOREIGN KEY (execution_pipeline_id)
-        REFERENCES pipelines (pipeline_id) MATCH SIMPLE
-        ON UPDATE NO ACTION
-        ON DELETE CASCADE
-);

internal/store/database/migrate/sqlite/0020_create_table_pipelines.down.sql

@@ -1 +0,0 @@
-DROP TABLE pipelines;

internal/store/database/migrate/sqlite/0021_create_table_builds.down.sql

@@ -1 +0,0 @@
-DROP TABLE executions;