Remove the unused generic_sensor_mocks.js and all references to it

All tests that previously relied on generic_sensor_mocks.js have now
been updated to use WebDriver, making generic_sensor_mocks.js obsolete.

Bug: 1278377, 1520919
Change-Id: I50deb52438d63ffb6c2c0c603a7ec7b0f5fb71f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5307823
Reviewed-by: Raphael Kubo Da Costa <[email protected]>
Reviewed-by: Gregory Guterman <[email protected]>
Commit-Queue: Gregory Guterman <[email protected]>
Auto-Submit: Juha J Vainio <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1262748}

lint.ignore

@@ -588,7 +588,6 @@ MISSING-LINK: css/filter-effects/*.any.js
 # Tests that use WebKit/Blink testing APIs
 LAYOUTTESTS APIS: import-maps/data-driven/resources/test-helper-iframe.js
 LAYOUTTESTS APIS: resources/chromium/enable-hyperlink-auditing.js
-LAYOUTTESTS APIS: resources/chromium/generic_sensor_mocks.js
 LAYOUTTESTS APIS: resources/chromium/webxr-test.js
 LAYOUTTESTS APIS: webxr/resources/webxr_util.js
 
@@ -615,7 +614,6 @@ MISSING DEPENDENCY: resources/chromium/web-bluetooth-test.js
 MISSING DEPENDENCY: resources/chromium/webusb-test.js
 MISSING DEPENDENCY: resources/chromium/fake-serial.js
 MISSING DEPENDENCY: resources/chromium/fake-hid.js
-MISSING DEPENDENCY: resources/chromium/generic_sensor_mocks.js
 MISSING DEPENDENCY: resources/chromium/mock-battery-monitor.js
 MISSING DEPENDENCY: resources/chromium/mock-barcodedetection.js
 MISSING DEPENDENCY: resources/chromium/mock-direct-sockets.js