Revert "Terminate the display if initialization fails."

This reverts commit ebaadc6c2c.

Reason for revert: Breaking some Chrome/Dawn tests that use the VK backend

Original change's description:
> Terminate the display if initialization fails.
>
> If DisplayImpl::initialize fails, call terminate to ensure no resources
> are leaked.
>
> This is a speculative fix for dual GPU macs not falling back to the
> low power GPU. DisplayMtl leaks the metal device if it fails to
> initialize due to unsupported GPU families or vendors.
>
> Bug: chromium:1322521
> Change-Id: Ie227216bc92ef2834ec50190fbb78bec45e9c053
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4641107
> Commit-Queue: Geoff Lang <geofflang@chromium.org>
> Reviewed-by: Kenneth Russell <kbr@chromium.org>

Bug: chromium:1322521
Change-Id: I379521130071623a8d050d2cadf2059c0b696d32
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4678359
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Geoff Lang <geofflang@chromium.org>

src/libANGLE/Display.cpp

@@ -1062,7 +1062,6 @@ Error Display::initialize()
     {
         // Log extended error message here
         ERR() << "ANGLE Display::initialize error " << error.getID() << ": " << error.getMessage();
-        mImplementation->terminate();
         return error;
     }
 

src/libANGLE/renderer/DisplayImpl.h

@@ -76,8 +76,6 @@ class DisplayImpl : public EGLImplFactory, public angle::Subject
     DisplayImpl(const egl::DisplayState &state);
     ~DisplayImpl() override;
 
-    // Initializ the display implementation. If this fails, terminate will be called to release any
-    // partially-initialized resources.
     virtual egl::Error initialize(egl::Display *display) = 0;
     virtual void terminate()                             = 0;
     virtual egl::Error prepareForCall();