Remove cartodb from search path

All calls to the extension functions should, and are,
be properly qualified, so there is no need to keep
the cartodb schema in the search_path

scripts-available/CDB_GhostTables.sql

@@ -67,7 +67,7 @@ $$  LANGUAGE plpgsql
     VOLATILE
     PARALLEL UNSAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;
 
 -- Trigger function to call CDB_LinkGhostTables()
 CREATE OR REPLACE FUNCTION @extschema@._CDB_LinkGhostTablesTrigger()
@@ -84,7 +84,7 @@ $$  LANGUAGE plpgsql
     VOLATILE
     PARALLEL UNSAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;
 
 -- Event trigger to save the current transaction in @extschema@.cdb_ddl_execution
 CREATE OR REPLACE FUNCTION @extschema@.CDB_SaveDDLTransaction()
@@ -97,7 +97,7 @@ $$  LANGUAGE plpgsql
     VOLATILE
     PARALLEL UNSAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;
 
 -- Creates the trigger on DDL events to link ghost tables
 CREATE OR REPLACE FUNCTION @extschema@.CDB_EnableGhostTablesTrigger()

scripts-available/CDB_OAuth.sql

@@ -30,7 +30,7 @@ $$  LANGUAGE plpgsql
     VOLATILE
     PARALLEL UNSAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;
 
 -- Creates the trigger on DDL events in order to reassign the owner
 CREATE OR REPLACE FUNCTION @extschema@.CDB_EnableOAuthReassignTablesTrigger()

scripts-available/CDB_TableMetadata.sql

@@ -59,7 +59,7 @@ $$  LANGUAGE plpgsql
     VOLATILE
     PARALLEL UNSAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;
 
 --
 -- Trigger invalidating varnish whenever CDB_TableMetadata
@@ -123,7 +123,7 @@ $$  LANGUAGE plpgsql
     VOLATILE
     PARALLEL UNSAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;
 
 DROP TRIGGER IF EXISTS table_modified ON @extschema@.CDB_TableMetadata;
 -- NOTE: on DELETE we would be unable to convert the table

scripts-available/CDB_Username.sql

@@ -7,4 +7,4 @@ $$  LANGUAGE SQL
     STABLE
     PARALLEL SAFE
     SECURITY DEFINER
-    SET search_path = @extschema@, pg_temp;
+    SET search_path = pg_temp;