fix(mgb): remove unnecessary null pointer checks

GitOrigin-RevId: 85aa0a9bdb0f329d87b82fed4451094b002fdc85

dnn/src/common/cv/filter.cpp

@@ -106,10 +106,8 @@ FilterEngine<ST, FT>::FilterEngine(BaseRowFilter* row_filter,
 
 template <typename ST, typename FT>
 FilterEngine<ST, FT>::~FilterEngine() {
-    if (m_row_filter != NULL)
-        delete m_row_filter;
-    if (m_column_filter != NULL)
-        delete m_column_filter;
+    delete m_row_filter;
+    delete m_column_filter;
 }
 
 template <typename ST, typename FT>

src/jit/impl/halide/halide_executable.cpp

@@ -25,9 +25,7 @@ HalideExecutable::FunctionHandle::~FunctionHandle() {
             device_release(i.second);
         }
     }
-    if (uctx_map) {
-        delete uctx_map;
-    }
+    delete uctx_map;
     if (dl_handle) {
         ExecutableHelper::get().unload_lib(dl_handle);
     }