fix: remove deprecated props

Author: mrholek

src/views/pages/page404/Page404.js

@@ -28,7 +28,7 @@ const Page404 = () => {
               <CInputGroupText>
                 <CIcon icon={cilMagnifyingGlass} />
               </CInputGroupText>
-              <CFormInput size="16" type="text" placeholder="What are you looking for?" />
+              <CFormInput type="text" placeholder="What are you looking for?" />
               <CButton color="info">Search</CButton>
             </CInputGroup>
           </CCol>

src/views/pages/page500/Page500.js

@@ -28,7 +28,7 @@ const Page500 = () => {
               <CInputGroupText>
                 <CIcon icon={cilMagnifyingGlass} />
               </CInputGroupText>
-              <CFormInput size="16" type="text" placeholder="What are you looking for?" />
+              <CFormInput type="text" placeholder="What are you looking for?" />
               <CButton color="info">Search</CButton>
             </CInputGroup>
           </CCol>

src/views/pages/register/Register.js

@@ -55,9 +55,9 @@ const Register = () => {
                       autoComplete="new-password"
                     />
                   </CInputGroup>
-                  <CButton color="success" block>
-                    Create Account
-                  </CButton>
+                  <div className="d-grid">
+                    <CButton color="success">Create Account</CButton>
+                  </div>
                 </CForm>
               </CCardBody>
             </CCard>