[partition] Remove unused PartitionLayout constructor

- The constructor PartitionLayout with PartitionEntry appears to be
  unused since its always. Drop it!

src/modules/partition/core/PartitionLayout.cpp

@@ -48,12 +48,6 @@ PartitionLayout::PartitionLayout()
 {
 }
 
-PartitionLayout::PartitionLayout( PartitionLayout::PartitionEntry entry )
-    : PartitionLayout()
-{
-    m_partLayout.append( entry );
-}
-
 PartitionLayout::PartitionLayout( const PartitionLayout& layout )
     : m_defaultFsType( layout.m_defaultFsType )
     , m_partLayout( layout.m_partLayout )

src/modules/partition/core/PartitionLayout.h

@@ -59,7 +59,6 @@ public:
     };
 
     PartitionLayout();
-    PartitionLayout( PartitionEntry entry );
     PartitionLayout( const PartitionLayout& layout );
     ~PartitionLayout();