Clean up talon.scm based on tree-sitter-talon 4.0 (#2005)

See wenkokke/tree-sitter-talon#42

## Checklist

- [-] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [-] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [-] I have not broken the cheatsheet

Author: pokey

packages/cursorless-engine/src/languages/TreeSitterQuery/queryPredicateOperators.ts

@@ -19,17 +19,6 @@ class NotType extends QueryPredicateOperator<NotType> {
   }
 }
 
-/**
- * A predicate operator that returns true if the nodes range is not empty.
- */
-class NotEmpty extends QueryPredicateOperator<NotEmpty> {
-  name = "not-empty?" as const;
-  schema = z.tuple([q.node]);
-  run({ range }: MutableQueryCapture) {
-    return !range.isEmpty;
-  }
-}
-
 /**
  * A predicate operator that returns true if the node's parent is not of the
  * given type. For example, `(not-parent-type? @foo string)` will reject the
@@ -208,7 +197,6 @@ class InsertionDelimiter extends QueryPredicateOperator<InsertionDelimiter> {
 export const queryPredicateOperators = [
   new Log(),
   new NotType(),
-  new NotEmpty(),
   new NotParentType(),
   new IsNthChild(),
   new ChildRange(),

queries/talon.scm

@@ -25,19 +25,11 @@
   (parrot_declaration)
 ] @statement
 
-(
-  [
-    (matches)
-    (declarations)
-    (block)
-  ] @statement.iteration
-
-  ;; The Talon Tree sitter can contain an empty matches node if there is no
-  ;; header. When this happens and the user has an empty cursor at the start of
-  ;; the document we get an empty range for the iteration scope for
-  ;; key/value/name/statement.
-  (#not-empty? @statement.iteration)
-)
+[
+  (matches)
+  (declarations)
+  (block)
+] @statement.iteration
 
 ;;!! not mode: command
 ;;!  ----^^^^---------
@@ -107,15 +99,13 @@
 ;;!   -------------
 ;;!!  foo: key(a)
 ;;!   -----------]
-(
-  (source_file
-    (matches) @condition @_.trailing
-  ) @_.domain
-  (#not-empty? @condition)
-  (#not-empty? @_.trailing)
-  (#shrink-to-match! @condition "^(?<keep>.*)(\s|\n|\r)+-$")
-  (#shrink-to-match! @_.trailing "^.*(?<keep>(\s|\n|\r)+-)$")
-)
+(source_file
+  (matches
+    (_) @condition.end.endOf
+    .
+    "-" @_.trailing
+  ) @condition.start.startOf
+) @_.domain
 
 ;;!! slap: key(enter)
 ;;!  ^^^^^^^^^^^^^^^^