Remove redundant test name prefixes now that test names are fully qualified

Follow up to #19079, which made test names fully qualified.

This fixes tests that now-redundant information in their test names. For example here's a fully qualified test name before the changes in this commit:

"priority_queue.test.std.PriorityQueue: shrinkAndFree"

and the same test's name after the changes in this commit:

"priority_queue.test.shrinkAndFree"

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/std/Thread.zig b/lib/std/Thread.zig
index ae794f44af..bf538c1b4f 100644
--- a/lib/std/Thread.zig
+++ b/lib/std/Thread.zig
@@ -1437,7 +1437,7 @@ fn testIncrementNotify(value: *usize, event: *ResetEvent) void {
     event.set();
 }
 
-test "Thread.join" {
+test "join" {
     if (builtin.single_threaded) return error.SkipZigTest;
 
     var value: usize = 0;
@@ -1449,7 +1449,7 @@ test "Thread.join" {
     try std.testing.expectEqual(value, 1);
 }
 
-test "Thread.detach" {
+test "detach" {
     if (builtin.single_threaded) return error.SkipZigTest;
 
     var value: usize = 0;