Remove warning when calling measure from RN runtime (software-mansi…

…on#4526)

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## Summary

This PR removes a warning that would trigger when `measure` function was
called from the main RN runtime.

The main motivation behind adding this `console.warn` was to force the
developer to explicitly cover the case when `measure` is called from the
RN runtime using `if (!_WORKLET) { ... }` guard, which, let's be honest,
is quite uncomfortable. On the other hand, when measurement cannot be
made, e.g. when called from the UI runtime but when the view is not
mounted yet, `measure` returns `null`, which needs to be handled with
`if (measured === null) { ... }`. It makes sense to merge these two
cases since they can be handled identically.

## Test plan

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test out this change along with instructions how to run it and a
description of the expected behavior. -->

src/reanimated2/NativeMethods.ts

@@ -39,14 +39,6 @@ if (isWeb()) {
   measure = (animatedRef: RefObjectFunction<Component>) => {
     'worklet';
     if (!_WORKLET) {
-      console.warn(
-        '[Reanimated] measure() was called from the main JS context. Measure is ' +
-          'only available in the UI runtime. This may also happen if measure() ' +
-          'was called by a worklet in the useAnimatedStyle hook, because useAnimatedStyle ' +
-          'calls the given worklet on the JS runtime during render. If you want to ' +
-          'prevent this warning then wrap the call with `if (_WORKLET)`. Then it will ' +
-          'only be called on the UI runtime after the render has been completed.'
-      );
       return null;
     }