[valadoc] docs: Fix syntax of several documentation blocks

[Rico Tzschichholz <ricotz src gnome org>]

commit 0ca1cfea3a5d1f26347cb7d010176c2e5604ce98
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Sep 6 08:49:53 2017 +0200

    docs: Fix syntax of several documentation blocks

 src/libvaladoc/api/callable.vala        |    2 --
 src/libvaladoc/api/field.vala           |    2 --
 src/libvaladoc/api/formalparameter.vala |    2 --
 src/libvaladoc/api/property.vala        |    2 --
 4 files changed, 0 insertions(+), 8 deletions(-)
---
diff --git a/src/libvaladoc/api/callable.vala b/src/libvaladoc/api/callable.vala
index 60515ee..1ab8679 100644
--- a/src/libvaladoc/api/callable.vala
+++ b/src/libvaladoc/api/callable.vala
@@ -32,8 +32,6 @@ using Gee;
 public interface Valadoc.Api.Callable : Symbol {
        /**
         * The return type of this symbol.
-        *
-        * @return The return type of this symbol or null for void
         */
        public abstract TypeReference? return_type {
                set;
diff --git a/src/libvaladoc/api/field.vala b/src/libvaladoc/api/field.vala
index a167c35..d395f2f 100644
--- a/src/libvaladoc/api/field.vala
+++ b/src/libvaladoc/api/field.vala
@@ -51,8 +51,6 @@ public class Valadoc.Api.Field : Member {
 
        /**
         * The field type.
-        *
-        * @return The field type or null for void
         */
        public TypeReference? field_type {
                set;
diff --git a/src/libvaladoc/api/formalparameter.vala b/src/libvaladoc/api/formalparameter.vala
index 82ed872..4147a3f 100644
--- a/src/libvaladoc/api/formalparameter.vala
+++ b/src/libvaladoc/api/formalparameter.vala
@@ -95,8 +95,6 @@ public class Valadoc.Api.FormalParameter : Symbol {
 
        /**
         * The parameter type.
-        *
-        * @return The parameter type or null for void
         */
        public TypeReference? parameter_type {
                set;
diff --git a/src/libvaladoc/api/property.vala b/src/libvaladoc/api/property.vala
index 556c7c9..0e458c7 100644
--- a/src/libvaladoc/api/property.vala
+++ b/src/libvaladoc/api/property.vala
@@ -61,8 +61,6 @@ public class Valadoc.Api.Property : Member {
 
        /**
         * The property type.
-        *
-        * @return The property type or null for void
         */
        public TypeReference? property_type {
                set;