Merge branch 'Alex/26-implement-close-system-call' into 'feature/system-calls'

Removing excess functionality

See merge request !16

userprog/syscall_close.c

@@ -23,8 +23,6 @@ void syscall_close(struct intr_frame *f) {
 	}
 	// Close the file using file_close, defined in file.h
 	file_close(file);
-	if (disassociate_file_descriptor(file_descriptor) == false) { // Checking if file is empty or non-existent
-		f->eax = -1; // Returning a failure state
-		return;
-	}
+	// Remove the file_descriptor
+	disassociate_file_descriptor(file_descriptor);
 }
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