[sw] Remove outdated comment from linker script

That comment seems to be carried over from PULP and doesn't make much
sense any more.

Signed-off-by: Philipp Wagner <phw@lowrisc.org>
diff --git a/sw/device/exts/common/link.ld b/sw/device/exts/common/link.ld
index 7422840..e580c6a 100644
--- a/sw/device/exts/common/link.ld
+++ b/sw/device/exts/common/link.ld
@@ -16,10 +16,6 @@
 
 _stack_start = ORIGIN(ram) + LENGTH(ram);
 
-/* We have to align each sector to word boundaries as our current s19->slm
- * conversion scripts are not able to handle non-word aligned sections. */
-
-
 SECTIONS {
     .crt : {
         *(.crt)