Remove extra semi-colons

A couple functions had extra semi-colons, which clang -Weverything
flags.  Remove them.

Change-Id: I2b44444c3184817dd0035c62b5ae114254457398
Signed-off-by: Ed Tanous <edtanous@google.com>
diff --git a/src/async/context.cpp b/src/async/context.cpp
index 6d50301..bbb198e 100644
--- a/src/async/context.cpp
+++ b/src/async/context.cpp
@@ -81,7 +81,7 @@
 /* The sender for the wait/process event. */
 struct wait_process_sender
 {
-    explicit wait_process_sender(context& ctx) : ctx(ctx){};
+    explicit wait_process_sender(context& ctx) : ctx(ctx) {}
 
     friend auto tag_invoke(execution::get_completion_signatures_t,
                            const wait_process_sender&, auto)