Remove public gpg_key

Right now, no jobs actually need the public keym, so remove it. For
signing-artifacts, we actually get a copy from the private key.

Change-Id: I61e147b7df2b07fe83c460fdfd1fb6bcea2e245f
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

zuul.yaml

@@ -313,57 +313,6 @@
 - secret:
     name: gpg_key
     data:
-      public: !encrypted/pkcs1-oaep
-        - hokUftqIPLeXkj6dd2cC6IYgzQfhmfQxKdFKsH0XfkjvgNRCr/Np98ykdXMx2dhiZEiJA
-          86KJnoYGmUP1ssEJiRfIdYWH4dPgCz1qJ4ucY4QTQnVQMWUyeDrBw/DXD7tKgqoLPF6ML
-          jDsHwX+RLlIntwtivOOcF4ZPXo1Q4D031jbTBGjGNkcz5G4PQTQO01iSAYzMGLYb2DOOL
-          mQqwXKmlBYZECuj9c8I1ycnYlhHc9lZ0yKDIfjQSs9/X/enWucee9nxaj19Tlh7ZLauar
-          940NLLowSUAmFLlYZODoevmVY0dMFiNKga2/tUhjuqc77UW1g/NTaTeUiKnhvgV28dpS8
-          p9g6aXufnBeRwACJ+0Mw7C7A5DB86DrXD8x/GpJUa018DD1mg0qw3g7smOESChtuYaUWv
-          jyo3S6iTHpnjMSNHZ6EYpkCs1UIiMtw1lb+gwxLLzmuDCavxZTwhaGbAfkn6rb13J16Q1
-          L2xjdoUjgZjYmTULh2ubHZgUpUCRzXVs0Cq1SM/Okm/lFv4DPexOp+nWRNmZzY1RJf4XJ
-          aPh4DWCtOulYXEHLQvQ4STLOzB4N2OzHrJq/GV4K1VbzC7GJ3B8ma1n1ZPDj+p9mEz5u/
-          JZpXibY+AE9+VP+Tkcdwm4SNGOW1ry/jiEKv+6Cbp9OVKonUuHuNEqC2ik6+50=
-        - EM7u25p4Rf68RhxZpMtpS/lugXdHwnmcuLblDpK+QsNL9kiZuLdVCoHIomNlCalfZS3a9
-          F5oVr2roRuViMDt+Wn0G+ZEhF5rU76mmPwUZ1DJt+qU/b6L+wpvmD5ac89iB9jbUuwBcW
-          lAPsw2PrL3gbjwjoPTwftEzAj+P8lOvI5d0R1+QvM0zYG+AHsJ2EG+yOtUkO/aIRAthLy
-          YwMWudyxMo0On81Gizmwx5Cf/2qLA3I8oNZM8lihu+dtf+6b6SR9Lc/ZlHGW06z6uAeR4
-          0yryfIc7dR2VdiOkircNTEEWzyw3no8JwfFJFZIKU96SiyKIbii1e+ykerwJRKpYoxg95
-          E8fykoSGdTkuHGeWAKGlNUB9LEl7ne2qxn4ybRenoYekngDDZGKmIjFbnCfHpDrUiM8cu
-          PhsNr32UKfsbSKbI3veKQn2ErDQsrHpSdmjED49YNB5Z4j5Wbt2fC93Hsw4m/NxcBgGRd
-          8QjxluUZ+ii+uTQlQXCxg4UokXhkb8nUs9zo8eBlpdiTmb4wRMK1FW5L/J/lC5PVfCOWL
-          EQ4aHfjNMZT2oi5YuFr1srhdCZgiI/3vTMP+3K6fPjRwnw7V6GgZxEtEAXLOir27rbykh
-          jUBIXTiGSYxx8jBkBixHe0kEEz/MqtKsoA1ZSAfxovim0Wqvi2PSn+ooAzm4eM=
-        - GHkHPj5LlWE4eSz9AgwfxlNm/wCyZMX/U6f917Il/cmesU4SxLMns9JF4pRQ0p1O0+WV/
-          mSTuk1nj5TsdpAf8u5SguS70GJFPdRUIyXeEl656CZVS5kOPE6hNZCE9+gYaxWAJPLqpz
-          T7mD+I+62U5C0Tz7K7LdnNvQ3WFkMQjuHP/A3H8VADCUGijlfn3M6FQKRzRphBEg2AV4b
-          pf9jIn32lUmrNYFAURDRC8COVQ779+HeBQOqSRq/RdnJbAkzVWJ8bfRD3zeuPfkqX4J05
-          yiICtcm+3TM7zDl4mgHJOgjsdfzrQw3LrWrIlzJdW4/SdDoM+3RKUR773spnctthfv1ho
-          5wK3YyvoZSGfXYls3fW5tpYkL4oImsUITp6WiFkfcu19vcHYOGnV1iY94tXHgdorXlOe5
-          b48BnUowB5IN0ucAcshp3OIAB6m2/bGE/6xljp9bGoUzRlOF+jm7q68RI+E9VAsRUJDuJ
-          pd9/jYIcMhtWWqjeSYun9dyoLjCbWFLkO+tywwT+s5VQccopTSNvSfHNEeCgvGYb6AVx/
-          oH+3P75DCw2hSiq9TppX1NJIDRJrT2PfMn+3/MxI84UsG+dipyX+4r/bM9BVhHDgZrzFh
-          rQIXHM6PAcRJXrv+op2CQA8YZFhjUm++6hL3Zev9Z5YWgR1ENpQtdoBIK5ZS+0=
-        - wmT7PcPohVqtBIy4g4LvtQ6oIHSGGz2KFcZQf0iFQGXZL/W6GBFSwLf0gmJntvo2hF3kd
-          dNlfXBosVZmBAmTDRpDtJTe8GvXxgDPBA2MWMqI6Wd9tD2F85rX9GF15V8iA797Lu2UZ+
-          XCEegVS1KnTv86H8pXW824yTkuRoLakKZBernXveJMHMwo8dVveMZKHQ+H7yZxDaz5IbA
-          NHZA7JXkUMXf5/kXqPwKDEIicsioC96zNKNLnw6LdnpFh6SyiOcLyXe/LgyxQuvK0ON+f
-          8yKGOBiHZmrGQ0739KEIlxNlkuj0PA/ZWFrf+U2Y1/N530B9hi3QamBjJFFuvwqzhQbhs
-          SP+nLZbIyxj4jt8fKsbVy2aNv8hBY/j2XJ8CI/OVGMXA9vuOugMhN+sYbQ39Cop7Epkz1
-          SEOG5M5PgBm06BtWyf3yj2oxKzjisdwCMMsA4/AZY3yjlRIG/zK6ksKkwbM1dspndba9c
-          2bKXcGao9otUzmF1vWKz/QLdFPK/BUzYze2L4F/DoNkkBTzJsF1EV49fxQ0fAHAOBgRbX
-          pVpGRbbpditv+uz4fz1voAYCQuc2IJFDjRb1NhMJZgFq2xbMU2T4uGlABa9eT6eHO91o3
-          TMA1lusrqF50d6KtVNu+6BnUFRi70qt8Oper9VQXCMfU/gory5UfqyxxwEER+8=
-        - KMaVxrOMccC4CR4gdnWV4DBItLgaUEJdPdLQsXX5sEqM+ocySOmmNDe4F3/Afo9BWyNJr
-          m5o0tsund3yXl8LuoDAynXCaVWw5/YYemAqwjscZA+cKwjGQ/Hl7n5mwKMIlYrxqCxv2G
-          gPWkZRC6dO0IJPwEsGUAQx9lyYMQN8JQbAq8YO9tq/YAs1LDmU/de/TpSV92pSH67vKfg
-          MTO1a1vqMJnx2cBosX2QYcggyJRBYUSVTd9XxcInyr58xsJhbK5GeQw13d6KXMRhk4Gv/
-          3DgAISI0eXNCoVLA716ki/DGlRki4GV/Y+bXs+8QWpZf+Zw/y4UiC4NP3pm6vkvDdh9je
-          OaKpkrlKovaWRdVBXKx/AjjfknzyDtQkXPsIHYeqnEFb9nuXHI0tWDR0AjunRqs0xq1pu
-          3bqO/gv5+m0oYbqwkGdSzLMzqrxjxWjqBXCgq8Ns/C09A6dklfgwuizMc5e74i9g+0CRw
-          R8rOr7yV+DgPcLhwenvDRxTSm5+fdlqPbBuCQeTOmcYaiaqXTZDevF6zvn0cL47ypf6AS
-          dhNI0kX/mocGvrNrau8iIKOf63lzW1suD7X2dBAr+nZlbdNG81e7mIc7QjAPDRIvy7eHx
-          61JombNJlVx/n56wnWy2FQC4XkvPcvb173ebqAGU1PbVTZ1+lLUJbIxZxcZYTk=
       private: !encrypted/pkcs1-oaep
         - LbjfVYmBnW00Ct6bMLPRA3RWV0e8DKbY+blEwRMny6EgzfNj7aBKgwEr9VxA/94pMMnZd
           ClEukrcxESYsO1BV3SUja4/E8QIp9g89ElJReZHoGwJCMCIU/nNLM9/VuWXAS0cd5qyup