Revert "fix: name an unaliased unary plus by its written text, as receipts record"

This reverts commit 89bcddf.

Author: kvlonge

crates/sqlquack-rules/src/conversion/_helpers/queries/output_names.rs

@@ -52,7 +52,6 @@ const NAMED_KINDS: &[&str] = &[
     "or",
     "paren",
     "neg",
-    "pos",
     "not",
     "is_null",
     "cast",

crates/sqlquack/tests/cli/test_output_names.rs

@@ -65,13 +65,12 @@ fn given_unaliased_items_when_converted_and_run_on_duckdb_then_they_take_snowfla
         },
         ColumnNameTestCase {
             description: "numbers keep their written form, upper-cased",
-            sql: "SELECT 1.50, 1e3, -2, +1, NULL, false",
+            sql: "SELECT 1.50, 1e3, -2, NULL, false",
             flags: &[],
             expected_names: vec![
                 "1.50".to_owned(),
                 "1E3".to_owned(),
                 "-2".to_owned(),
-                "+1".to_owned(),
                 "NULL".to_owned(),
                 "FALSE".to_owned(),
             ],