[Snowflake] Remove PUBLIC token (#3099)

Author: michael-the1

sql/snowflake/SnowflakeLexer.g4

@@ -636,7 +636,6 @@ PROFILE:                                               'PROFILE';
 PROPERTY:                                              'PROPERTY';
 PROVIDER:                                              'PROVIDER';
 PROVIDER_KEY_NAME:                                     'PROVIDER_KEY_NAME';
-PUBLIC:                                                'PUBLIC';
 PURGE:                                                 'PURGE';
 PUT:                                                   'PUT';
 PYTHON:                                                'PYTHON';

sql/snowflake/examples/call.sql

@@ -0,0 +1,2 @@
+call my_stored_proc(arg_1);
+call public.some_store_procedure('some input');

sql/snowflake/examples/other.sql

@@ -22,4 +22,3 @@ truncate materialized view v;
 truncate table t;
 unset i;
 unset (i,j,k);
-call my_stored_proc(arg_1);