fix misc-unused-using-decls

clang-tidy gets a few wrong (actually needed)

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty

src/OpenRoad.cc

@@ -102,10 +102,8 @@ extern int Ord_Init(Tcl_Interp* interp);
 
 namespace ord {
 
-using odb::dbBlock;
 using odb::dbChip;
 using odb::dbDatabase;
-using odb::dbLib;
 using odb::dbTech;
 
 using utl::ORD;

src/gui/src/layoutViewer.cpp

@@ -87,9 +87,7 @@ using odb::dbRowDir;
 using odb::dbSite;
 using odb::dbTech;
 using odb::dbTechLayer;
-using odb::dbTechLayerDir;
 using odb::dbTechLayerType;
-using odb::dbTrackGrid;
 using odb::dbTransform;
 using odb::Point;
 using odb::Rect;

src/rcx/src/extBenchDB.cpp

@@ -31,7 +31,6 @@ using odb::dbNet;
 using odb::dbObstruction;
 using odb::dbSet;
 using odb::dbTechLayer;
-using utl::RCX;
 
 namespace rcx {
 

src/rcx/src/extPatterns.cpp

@@ -23,7 +23,6 @@
 
 namespace rcx {
 
-using utl::RCX;
 using namespace odb;
 
 uint32_t extMain::benchPatternsGen(const PatternOptions& opt1)

src/rcx/src/extRCmodel.cpp

@@ -22,7 +22,6 @@
 #include "rcx/util.h"
 #include "utl/Logger.h"
 
-using odb::dbRSeg;
 using utl::RCX;
 
 namespace rcx {

src/rcx/src/extRulesVia.cpp

@@ -15,8 +15,6 @@
 
 namespace rcx {
 
-using utl::RCX;
-
 using namespace odb;
 
 // dkf 12272023

src/rcx/src/extSegment.cpp

@@ -15,7 +15,6 @@
 
 namespace rcx {
 
-using utl::RCX;
 using namespace odb;
 
 void extSegment::set(uint32_t dir,

src/rcx/src/extmeasure_calc.cpp

@@ -15,8 +15,6 @@
 #define FRINGE_UP_DOWN
 #endif
 
-using utl::RCX;
-
 namespace rcx {
 
 void extMeasureRC::VerticalCap(Array1D<extSegment*>* segTable, bool look_up)

src/rcx/src/extmeasure_couple.cpp

@@ -24,7 +24,6 @@ using odb::dbCCSeg;
 using odb::dbNet;
 using odb::dbRSeg;
 using odb::dbSet;
-using utl::RCX;
 
 namespace rcx {
 

src/rcx/src/extmeasure_diag.cpp

@@ -19,7 +19,6 @@
 // #define MIN_FOR_LOOPS
 
 using odb::dbNet;
-using utl::RCX;
 
 namespace rcx {