DOC: Fix unexpected token in class documentation

Fix unexpected token in the `itk::TransformGeometryImageFilter` class
documentation.

Remove the `\param` Doxygen commands from a non-function documentation
block, and reuse part of the documentation to describe what the filter
yields as its output.

Avoid duplicating the type of transformation the filter accepts in the
corresponding `Transform` macro (as it is already present in the class
documentation).

Take advantage of the commit to remove an unnecessary/uninformative part
from the `InputImage` macro.

Fixes:
```
Modules/Core/Transform/include/itkTransformGeometryImageFilter.h:45:
warning:
unexpected token in comment block while parsing the argument of command param
```

Reported for example in:
https://open.cdash.org/viewBuildError.php?type=1&buildid=8167118

Modules/Core/Transform/include/itkTransformGeometryImageFilter.h

@@ -29,8 +29,11 @@ namespace itk
  * \brief Modify an image's geometric meta-data, changing its "physical" extent.
  *
  * The TransformGeometryImageFilter "physically" changes the image in
- * space using the given transformation. The
- * specific transformation type can be any type derived from the
+ * space using the given transformation. The resulting image is an image with
+ * the same voxel values as the input, but with different physical space
+ * representation as affected by the transform.
+ *
+ * The specific transformation type can be any type derived from the
  * MatrixOffsetTransformBase and the TranslationTransform.
  * The modification of the geometric meta-data is an alternative to
  * resampling the moving image onto the fixed image grid, after registration. The advantages of using
@@ -44,12 +47,6 @@ namespace itk
  * should be saved in a format that supports a non ortho-normal
  * direction cosine matrix (e.g. nrrd).
  *
- * \param \c Transform Any transform derived from MatrixOffsetTransformBase or TranslationTransform.
- * \param \c InputImage The image to be duplicated and modified to incorporate the
- * transform.
- * \return An image with the same voxel values as the input, but with different
- * physical space representation affected by the transform.
- *
  * Let us call the transform operation from the fixed image to moving image <tt>TfmF2M</tt>.
  * Given a set of points from the fixed image in physical space (i.e. <tt>physicalFixedImagePoints</tt>),
  * the aim is to convert those points into the moving image physical space as
@@ -146,7 +143,7 @@ class ITK_TEMPLATE_EXPORT TransformGeometryImageFilter : public InPlaceImageFilt
   /** Set/Get required rigid transform. */
   itkSetGetDecoratedObjectInputMacro(Transform, TransformType);
 
-  /** Set/Get required input image. (A wrapper to this->Set/GetInput()) */
+  /** Set/Get required input image. */
   itkSetInputMacro(InputImage, InputImageType);
   itkGetInputMacro(InputImage, InputImageType);