Cleanup: remove redundant doxygen \file argument

Move \ingroup onto same line to be more compact and
make it clear the file is in the group.

source/blender/physics/BPH_mass_spring.h

@@ -17,8 +17,7 @@
  * All rights reserved.
  */
 
-/** \file blender/physics/BPH_mass_spring.h
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 #ifndef __BPH_MASS_SPRING_H__

source/blender/physics/intern/BPH_mass_spring.cpp

@@ -17,8 +17,7 @@
  * All rights reserved.
  */
 
-/** \file blender/physics/intern/BPH_mass_spring.cpp
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 extern "C" {

source/blender/physics/intern/eigen_utils.h

@@ -20,8 +20,7 @@
 #ifndef __EIGEN_UTILS_H__
 #define __EIGEN_UTILS_H__
 
-/** \file blender/physics/intern/eigen_utils.h
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 #if defined(__GNUC__) && !defined(__clang__)

source/blender/physics/intern/hair_volume.cpp

@@ -17,8 +17,7 @@
  * All rights reserved.
  */
 
-/** \file blender/physics/intern/hair_volume.cpp
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 #include "MEM_guardedalloc.h"

source/blender/physics/intern/implicit.h

@@ -20,8 +20,7 @@
 #ifndef __IMPLICIT_H__
 #define __IMPLICIT_H__
 
-/** \file implicit.h
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 #include "stdio.h"

source/blender/physics/intern/implicit_blender.c

@@ -17,8 +17,7 @@
  * All rights reserved.
  */
 
-/** \file blender/physics/intern/implicit_blender.c
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 #include "implicit.h"

source/blender/physics/intern/implicit_eigen.cpp

@@ -17,8 +17,7 @@
  * All rights reserved.
  */
 
-/** \file blender/physics/intern/implicit_eigen.cpp
- *  \ingroup bph
+/** \file \ingroup bph
  */
 
 #include "implicit.h"