Do not export class template LineParameterization

For MSVC, instantiating a dllimport class template will cause error C2491:
definition of dllimport function not allowed.

Change-Id: Icc7f7ea84598df0a5436f48ffc2bab5cfab93921

include/ceres/local_parameterization.h

diff --git a/include/ceres/local_parameterization.h b/include/ceres/local_parameterization.h
index 0d7b507..1576e82 100644
--- a/include/ceres/local_parameterization.h
+++ b/include/ceres/local_parameterization.h
@@ -276,7 +276,7 @@
 // manifold (see https://en.wikipedia.org/wiki/Affine_Grassmannian_(manifold))
 // for the case Graff_1(R^n).
 template <int AmbientSpaceDimension>
-class CERES_EXPORT LineParameterization : public LocalParameterization {
+class LineParameterization : public LocalParameterization {
  public:
   static_assert(AmbientSpaceDimension >= 2,
                 "The ambient space must be at least 2");