refactor: Comply with Wdeprecated-copy

Remove implicitly declared copy constructors

src/core/groupid.cpp

@@ -38,15 +38,6 @@ GroupId::GroupId()
 {
 }
 
-/**
- * @brief The copy constructor.
- * @param other GroupId to copy
- */
-GroupId::GroupId(const GroupId& other)
-    : ContactId(other.id)
-{
-}
-
 /**
  * @brief Constructs a GroupId from bytes.
  * @param rawId The bytes to construct the GroupId from. The lenght must be exactly

src/core/groupid.h

@@ -27,7 +27,6 @@ class GroupId : public ContactId
 {
 public:
     GroupId();
-    GroupId(const GroupId& other);
     explicit GroupId(const QByteArray& rawId);
     explicit GroupId(const uint8_t* rawId);
     int getSize() const override;

src/core/toxpk.cpp

@@ -42,15 +42,6 @@ ToxPk::ToxPk()
 {
 }
 
-/**
- * @brief The copy constructor.
- * @param other ToxPk to copy
- */
-ToxPk::ToxPk(const ToxPk& other)
-    : ContactId(other.id)
-{
-}
-
 /**
  * @brief Constructs a ToxPk from bytes.
  * @param rawId The bytes to construct the ToxPk from. The lenght must be exactly

src/core/toxpk.h

@@ -27,7 +27,6 @@ class ToxPk : public ContactId
 {
 public:
     ToxPk();
-    ToxPk(const ToxPk& other);
     explicit ToxPk(const QByteArray& rawId);
     explicit ToxPk(const uint8_t* rawId);
     explicit ToxPk(const QString& pk);