Revert commit f436b7d (Work around Windows file deletion problems)

... and resolve conflicts with previous commit.
This workaround is no longer necessary when using try-with-resources introduced with the previous commit.

Author: imagejan

src/test/java/org/scijava/io/handle/FileHandleTest.java

@@ -46,7 +46,6 @@
 import org.scijava.Context;
 import org.scijava.io.location.FileLocation;
 import org.scijava.io.location.Location;
-import org.scijava.util.PlatformUtils;
 
 /**
  * Tests {@link FileHandle}.
@@ -76,23 +75,22 @@ public void testExists() throws IOException {
 
 		final File nonExistentFile = //
 			File.createTempFile("FileHandleTest", "nonexistent-file");
-		final boolean deleted = delete(nonExistentFile);
+		assertTrue(nonExistentFile.delete());
+		assertFalse(nonExistentFile.exists());
 
 		final FileLocation loc = new FileLocation(nonExistentFile);
 		try (final DataHandle<?> handle = dhs.create(loc)) {
 			assertTrue(handle instanceof FileHandle);
-			if (deleted) {
-				assertFalse(handle.exists());
-				assertEquals(-1, handle.length());
-			}
+			assertFalse(handle.exists());
+			assertEquals(-1, handle.length());
 
 			handle.writeBoolean(true);
 			assertTrue(handle.exists());
 			assertEquals(1, handle.length());			
 		}
 
 		// Clean up.
-		delete(nonExistentFile);
+		assertTrue(nonExistentFile.delete());
 	}
 
 	@Test
@@ -121,7 +119,8 @@ public void testNotCreatedByRead() throws IOException {
 		final File nonExistentFile = //
 			File.createTempFile("FileHandleTest", "none xistent file");
 		final URI uri = nonExistentFile.toURI();
-		delete(nonExistentFile);
+		assertTrue(nonExistentFile.delete());
+		assertFalse(nonExistentFile.exists());
 
 		final FileLocation loc = new FileLocation(uri);
 		try (final DataHandle<?> handle = dhs.create(loc)) {
@@ -135,15 +134,4 @@ public void testNotCreatedByRead() throws IOException {
 		assertFalse(nonExistentFile.exists());
 		// reading from the non-existing file should not create it!
 	}
-
-	/** A workaround for Windows being bad at deleting files. */
-	private boolean delete(final File file) {
-		final boolean success = file.delete();
-		if (!success) file.deleteOnExit();
-		if (!PlatformUtils.isWindows()) {
-			assertTrue(success);
-			assertFalse(file.exists());
-		}
-		return success;
-	}
 }