Revert "fix(test): clear spy mock calls after beforeEach setup"

This reverts the mockClear() calls that were causing test failures on
all platforms. The mockClear() calls themselves were triggering
additional spy invocations, making the problem worse.

Need to investigate the root cause of platform-specific test failures
more carefully.

Author: jdalton

test/stdio/stderr.test.ts

@@ -47,11 +47,6 @@ describe('stdio/stderr', () => {
     cursorToSpy = vi.spyOn(stderr, 'cursorTo').mockImplementation(() => {})
     // @ts-expect-error - Vitest spy type doesn't match ReturnType<typeof vi.spyOn>
     clearLineSpy = vi.spyOn(stderr, 'clearLine').mockImplementation(() => {})
-
-    // Clear any calls made during setup
-    writeSpy.mockClear()
-    cursorToSpy.mockClear()
-    clearLineSpy.mockClear()
   })
 
   afterEach(() => {

test/stdio/stdout.test.ts

@@ -62,12 +62,6 @@ describe('stdio/stdout', () => {
       .spyOn(stdout, 'clearScreenDown')
       // @ts-expect-error - Vitest mock type doesn't match expected implementation signature
       .mockImplementation(() => {})
-
-    // Clear any calls made during setup
-    writeSpy.mockClear()
-    cursorToSpy.mockClear()
-    clearLineSpy.mockClear()
-    clearScreenDownSpy.mockClear()
   })
 
   afterEach(() => {