Fix GCC build.

noexcept is only needed for declaration, not definition.

Change-Id: Ib51f7dfdadd90e49cee944f9900d02b6de8ccb96
diff --git a/src/trace_processor/table.cc b/src/trace_processor/table.cc
index 41d382b..228551d 100644
--- a/src/trace_processor/table.cc
+++ b/src/trace_processor/table.cc
@@ -269,7 +269,7 @@
 }
 
 Table::Schema::Schema() = default;
-Table::Schema::Schema(const Schema&) noexcept = default;
+Table::Schema::Schema(const Schema&) = default;
 Table::Schema& Table::Schema::operator=(const Schema&) = default;
 
 std::string Table::Schema::ToCreateTableStmt() {