remove vitrual dtors

src/TinyGsmClientA6.h

@@ -123,8 +123,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmA6() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientBG96.h

@@ -146,7 +146,6 @@ public:
   {
     memset(sockets, 0, sizeof(sockets));
   }
-  virtual ~TinyGsmBG96() {}
 
   /*
    * Basic functions

src/TinyGsmClientESP8266.h

@@ -141,8 +141,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmESP8266() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientM590.h

@@ -121,8 +121,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmM590() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientM95.h

@@ -143,8 +143,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmM95() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientMC60.h

@@ -147,8 +147,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmMC60() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientSIM5360.h

@@ -130,8 +130,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmSim5360(){}
-
   /*
    * Basic functions
    */

src/TinyGsmClientSIM7000.h

@@ -154,8 +154,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmSim7000() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientSIM7600.h

@@ -130,8 +130,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmSim7600(){}
-
   /*
    * Basic functions
    */

src/TinyGsmClientSIM800.h

@@ -153,8 +153,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmSim800() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientSIM808.h

@@ -22,8 +22,6 @@ public:
     : TinyGsmSim800(stream)
   {}
 
-  virtual ~TinyGsmSim808(){}
-
   /*
    * GPS location functions
    */

src/TinyGsmClientSaraR4.h

@@ -172,8 +172,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmSaraR4(){}
-
   /*
    * Basic functions
    */

src/TinyGsmClientSequansMonarch.h

@@ -183,8 +183,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmSequansMonarch() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientUBLOX.h

@@ -164,8 +164,6 @@ public:
     memset(sockets, 0, sizeof(sockets));
   }
 
-  virtual ~TinyGsmUBLOX() {}
-
   /*
    * Basic functions
    */

src/TinyGsmClientXBee.h

@@ -287,9 +287,6 @@ public:
       inCommandMode = false;
       memset(sockets, 0, sizeof(sockets));
   }
-
-  virtual ~TinyGsmXBee() {}
-
   /*
    * Basic functions
    */