store: Fix firehose migration syntax (#3021)

evaporei · web-flow · commit 590df45316c6 · 2021-11-30T20:09:37.000-03:00
Removes extra 'text' type.
diff --git a/store/postgres/migrations/2021-07-09-144144_firehose_cursor/down.sql b/store/postgres/migrations/2021-07-09-144144_firehose_cursor/down.sql
@@ -1,2 +1,2 @@
 alter table subgraphs.subgraph_deployment
-    drop column firehose_cursor text;
+    drop column firehose_cursor;

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1,2 @@`
`1`	`1`	`alter table subgraphs.subgraph_deployment`
`2`		`- drop column firehose_cursor text;`
	`2`	`+ drop column firehose_cursor;`