DevTools: Remove flaky part from promise tests.

LayoutTests/inspector/sources/debugger/debugger-uncaught-promise-on-dom-exception-expected.txt

Index: LayoutTests/inspector/sources/debugger/debugger-uncaught-promise-on-dom-exception-expected.txt
diff --git a/LayoutTests/inspector/sources/debugger/debugger-uncaught-promise-on-dom-exception-expected.txt b/LayoutTests/inspector/sources/debugger/debugger-uncaught-promise-on-dom-exception-expected.txt
deleted file mode 100644
index 2f3fbdc50e94d428f8987272dbc0e7e2d0fc6f0b..0000000000000000000000000000000000000000
--- a/LayoutTests/inspector/sources/debugger/debugger-uncaught-promise-on-dom-exception-expected.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-CONSOLE ERROR: line 30: Unhandled promise rejection
-Tests unhandled promise that was rejected with a DOM exception.
-
-Set timer for test function.
-debugger-uncaught-promise-on-dom-exception.html:10 Console was cleared
-
-    debugger-uncaught-promise-on-dom-exception.html:30 Unhandled promise rejection Promise {[[PromiseStatus]]: "rejected", [[PromiseValue]]: DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of th…}
-        __proto__: Promise
-        [[PromiseStatus]]: "rejected"
-        [[PromiseValue]]: DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node.
-        debugger-uncaught-promise-on-dom-exception.html:30 throwDOMException
-        debugger-uncaught-promise-on-dom-exception.html:21 p_catch
-