Revert "Adds fuzzy search for help search dialog"

This reverts commit 481dbceed0d0610a6c689e3be448b7953994763e.

Current fuzzy search implementation results in too many
non-useful results.

Could be re-added after result sort/filter/score functionality
is added. See #30072 for example existing implementation.

Fixes: #39128

Reverts: #32043

Fixed format style conflicts:
	editor/editor_help_search.cpp

(cherry picked from commit 55d706c352fd3cbb25418201053bc0d688ee88d4)

editor/editor_help_search.cpp

@@ -344,16 +344,12 @@ bool EditorHelpSearch::Runner::_phase_match_classes() {
 			if (search_flags & SEARCH_METHODS)
 				for (int i = 0; i < class_doc.methods.size(); i++) {
 					String method_name = (search_flags & SEARCH_CASE_SENSITIVE) ? class_doc.methods[i].name : class_doc.methods[i].name.to_lower();
-					String aux_term = (search_flags & SEARCH_CASE_SENSITIVE) ? term : term.to_lower();
-
-					if (aux_term.begins_with("."))
-						aux_term = aux_term.right(1);
-
-					if (aux_term.ends_with("("))
-						aux_term = aux_term.left(aux_term.length() - 1).strip_edges();
-
-					if (aux_term.is_subsequence_of(method_name))
+					if (method_name.find(term) > -1 ||
+							(term.begins_with(".") && method_name.begins_with(term.right(1))) ||
+							(term.ends_with("(") && method_name.ends_with(term.left(term.length() - 1).strip_edges())) ||
+							(term.begins_with(".") && term.ends_with("(") && method_name == term.substr(1, term.length() - 2).strip_edges())) {
 						match.methods.push_back(const_cast<DocData::MethodDoc *>(&class_doc.methods[i]));
+					}
 				}
 			if (search_flags & SEARCH_SIGNALS)
 				for (int i = 0; i < class_doc.signals.size(); i++)
@@ -440,11 +436,11 @@ bool EditorHelpSearch::Runner::_phase_select_match() {
 }
 
 bool EditorHelpSearch::Runner::_match_string(const String &p_term, const String &p_string) const {
-
-	if (search_flags & SEARCH_CASE_SENSITIVE)
-		return p_term.is_subsequence_of(p_string);
-	else
-		return p_term.is_subsequence_ofi(p_string);
+	if (search_flags & SEARCH_CASE_SENSITIVE) {
+		return p_string.find(p_term) > -1;
+	} else {
+		return p_string.findn(p_term) > -1;
+	}
 }
 
 void EditorHelpSearch::Runner::_match_item(TreeItem *p_item, const String &p_text) {